Rozzi Matteo, Tiberti Giulia, Mucedero Manuela, Cozza Paola
Department of Systems Medicine, University of Rome "Tor Vergata," Rome, Italy.
Department of Systems Medicine, University of Rome "Tor Vergata," Rome, Italy.
Am J Orthod Dentofacial Orthop. 2022 Nov;162(5):645-655. doi: 10.1016/j.ajodo.2021.06.020. Epub 2022 Aug 8.
The purpose of this study was to evaluate and compare leveling of the curve of Spee (COS) achieved by traditional fixed appliances and Invisalign clear aligners (Align Technology, Santa Clara, Calif).
This retrospective study involved 2 groups of subjects with an increased COS depth. Patients treated with the Invisalign system (I group) and patients treated with the standard edgewise full-fixed appliance (F group). The I group included 30 subjects (13 males, 17 females; mean age, 24 years 5 months ± 19 months). The F group included 32 subjects (12 males, 20 females; mean age, 22 years 4 months ± 21 months). The 2 groups were matched for sex, age, vertical pattern, and observation period. Pretreatment (T0) and posttreatment (T1) lateral cephalograms were analyzed. COS depth was measured on digital dental casts. The intragroup variation between T0 and T1 was analyzed with a paired t test. The intergroup variation was evaluated using an unpaired t test.
The leveling of COS was statistically significant, comparing T0 and T1 within the groups. The F group presented a statistically significant extrusion of posterior teeth, with a flaring of the mandibular incisors. The I group showed a statistically significant intrusion of the mandibular incisors, with excellent control in the proclination of incisors during the intrusion movement.
Traditional continuous archwire treatment and the Invisalign system effectively level the COS.
本研究的目的是评估和比较传统固定矫治器与隐适美透明矫治器（Align Technology，加利福尼亚州圣克拉拉）实现的司皮曲线（COS）整平效果。
这项回顾性研究纳入了两组COS深度增加的受试者。接受隐适美系统治疗的患者（I组）和接受标准方丝弓全固定矫治器治疗的患者（F组）。I组包括30名受试者（13名男性，17名女性；平均年龄，24岁5个月±19个月）。F组包括32名受试者（12名男性，20名女性；平均年龄，22岁4个月±21个月）。两组在性别、年龄、垂直骨面型和观察期方面进行了匹配。分析治疗前（T0）和治疗后（T1）的头颅侧位片。在数字化牙模上测量COS深度。使用配对t检验分析T0和T1之间的组内差异。使用独立样本t检验评估组间差异。
比较组内的T0和T1，COS的整平具有统计学意义。F组后牙出现具有统计学意义的伸长，下颌切牙唇倾。I组下颌切牙出现具有统计学意义的压低，压低过程中切牙唇倾得到良好控制。
传统连续弓丝治疗和隐适美系统均能有效整平COS。
